private void UpdateFrequency(long f, FrequencyChangeSource source) { var min = (long)(_displayCenterFrequency - _spectrumWidth / _scale / 2); if (f < min) { f = min; } var max = (long)(_displayCenterFrequency + _spectrumWidth / _scale / 2); if (f > max) { f = max; } if (_useSnap) { f = (f + Math.Sign(f) * _stepSize / 2) / _stepSize * _stepSize; } if (f != _frequency) { var args = new FrequencyEventArgs(f, source); OnFrequencyChanged(args); if (!args.Cancel) { _frequency = args.Frequency; _performNeeded = true; } } }
private void UpdateCenterFrequency(long f, FrequencyChangeSource source) { if (f < 0) { f = 0; } if (_useSnap) { f = (f + Math.Sign(f) * _stepSize / 2) / _stepSize * _stepSize; } if (f != _centerFrequency) { var args = new FrequencyEventArgs(f, source); OnCenterFrequencyChanged(args); if (!args.Cancel) { var delta = args.Frequency - _centerFrequency; _displayCenterFrequency += delta; _centerFrequency = args.Frequency; _drawBackgroundNeeded = true; } } }
protected virtual void OnCenterFrequencyChanged(FrequencyEventArgs e) { if (CenterFrequencyChanged != null) { CenterFrequencyChanged(this, e); } }